Assortative Mating
Mostrando 1-12 de 50 artigos, teses e dissertações.
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1. Especiação sem barreiras e padrões de diversidade / Speciation without barriers and diversity petterns
Nesse trabalho, estudamos doismecanismos de formação de espécies. No primeiro deles, consideramos um modelo espacial de especiação neutra totalmente probabilístico, sem barreiras geográficas ou interações ecológicas. A população evolui devido a influência de reprodução sexuada, mutações e recombinação. O modelo é baseado em acasalamento s
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/06/2010
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2. Aplicações de mecânica estatística a especiação simpátrica e inferência aproximativa / Applications of statistical mechanics to sympatric speciation and aproximative inference
This thesis presents applications of the framework of Statistical Mechanics to two independent problems. The first corresponds to a computational model for the evolution of Assortative Mating in the Sympatric Speciation process; and the second a learning algorithm built by means of a Bayesian Inference approach. In the biological problem each individual in a
Publicado em: 2009
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3. Elytra colour polymorphism and randomness of matings in Chauliognathus fallax Germar 1824 from southern Brazil (Coleoptera, Cantharidae)
Beetles of the species Chauliognathus fallax Germar 1824 are polymorphic for elytron colouration with six morphs distinguished on the basis of black pigmentation on a yellow background. We investigated samples of C. fallax taken in eight consecutive weeks aiming to determine the frequency of the morphs which were grouped, for statistical analysis, into three
Revista Brasileira de Entomologia. Publicado em: 2003
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4. Eye colour as a genetic marker for fertility and fecundity of Triatoma infestans (Klug, 1834) Hemiptera, Reduviidae, Triatominae
Eye colour of Triatoma infestans is controlled at a single autosomal locus, with black-eye as the dominant gene and red-eye as the recessive. Inheritance of these characters follows a classical Mendelian system, enabling eye colour to be used as a marker for studies of mating frequency. We found no significant differences in oviposition rates and egg hatchin
Memórias do Instituto Oswaldo Cruz. Publicado em: 2002-07
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5. Systems of Mating. III. Assortative Mating Based on Somatic Resemblance
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6. Systems of Mating. III. Assortative Mating Based on Somatic Resemblance
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7. Assortative fertilization in Drosophila
The concept of gametic isolation has its origins in the 1937 edition of T. Dobzhansky’s Genetics and the Origin of Species. Involving either positive assortative fertilization (as opposed to self-incompatibility) or negative assortative fertilization, it occurs after mating but prior to fertilization. Gametic isolation is generally subsumed under eith
The National Academy of Sciences of the USA.
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8. An epistatic mating system model can produce permanent cytonuclear disequilibria in a hybrid zone.
We examine the evolutionary dynamics of gametic and genotypic disequilibria between a cytoplasmic gene and a nuclear gene under two mating system models relevant to hybrid zones. In the first model, in which female mating preference is determined by an epistatic interaction between the two loci, permanent nonzero cytonuclear disequilibria are possible for a
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9. The Effects of Assortative Mating and Migration on Cytonuclear Associations in Hybrid Zones
We examine the influence of nonrandom mating and immigration on the evolutionary dynamics of cytonuclear associations in hybrid zones. Recursion equations for allelic and genotypic cytonuclear disequilibria were generated under models of (1) migration alone, assuming hybrid zone matings are random with respect to cytonuclear genotype; and (2) migration in co
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10. Further Analysis of Negative Assortative Mating
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11. The Influence of the Mating System on the Maintenance of Genetic Variability in Polygenic Characters
The traditional models of the effect of assortative mating and inbreeding on the genetic variance of polygenic characters (Fisher 1918; Wright 1921) presume that there is no natural selection or mutation. In a large population, the genetic variance determined by additive genes may then increase by up to a factor of two with local inbreeding, and even more w
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12. Limiting Distribution under Assortative Mating
A multi-locus model for complete positive assortative mating is discussed. For a two-locus model, if the gene frequencies for the two loci are different, as they are likely to be, it is shown that in equilibrium the population is not composed of only two homozygous types, as is usually thought. The limiting distribution will have three homozygous genotypes d